Improvement in heaters



J. MAGEE.

HEATER.

No. 37,027. PatentedNov. 25, 1862.

Jaz/eiiar: i

UNITED STATES PATENT OFFICE,

JOHN MAGEE, 0E CHELsEa'AssIGNOR TO THE NORTON FURNACE 00., OF NORTON, MAssAoHUsErrs;

IMPROVEMENT IN HEATERS.

Specification forming part of Letters Patent No. 37,027. dated N vrm l 2 1 To all whom, it may concern.-

Be it known that 1, JOHN MAGEE, a citizen ofthe United States of America. and a resident of Chelsea, in the county ofSuffolk and State of Massachusettshave made a new and useful invention-having reference to stoves, as well as 'h0t-air furnaces; and I do hereby declare the same to be fully described in the following specification, and represented in the accompanying drawings, of which- Figure l is a top view, Fig. 2 a side elevation, and Fig. 3 a vertical and transverse section, of the internal parts of a hot-air furnace as provided'with my invention, which particularly belongs to hot-air [furnaces or stoves whose radiators are furnished with pipes or conduits to extend and convey air through them for the purpose of being warmed or heated.

In the said drawings, A denotes the fire-pot or fuel-chamber as provided with a grate, B, and situated over an ash pit or chamber, 0. The said fire-pot A is placed within a radiator or domed chamber, D, having under its bottom a smoke-dischargingconduit or trunk, E, which is extended partially around the ashchamber, and at or near the front part of the furnace may be made to open into a vertical discharge-flue, F. The radiator is to freely communicate with the said conduitE. Aseries of pipes, G G G G, extend from the vertical sides of the radiator to-its top, each of them being arranged within the radiator. To each of these air-conduits there may be another, which'may extend beyond the sides of the radiator, as shown at H in the drawings,

it being understood that each of'these last-- named pipes is not only to pass through the air-chamber I and thecase or wall thereof, which is to surround the said radiator, but is to open at its lower end into the air outside of such chamber I.

When air-pipes are used within a radiator in manner as described, it has been found very ditficult to preserve tight joints at their connections with the top and sides of the radiator, owing to the unequal expansion and contracticincf the radiator, and the pipes-(caused by heat) either crack in the joints, or breakage c the pipes is apt to ensue, and thereby al- 10W of leakage of more or less smoke or gases i to the chamber containing the radiator.

The principal object of my invention is to prevent not only breakage of the air-pipes, but to preserve their joints tight when the stove or furnace may be in use. To accomplish this, support each of the air-conduits which passes through the radiator by yieldingjoints an ranged at both ends of it, and although the lowermost joint used is what may be termed a sand joint, the uppermost one is a (Zombi nation of a sand joint and a fusiblemetal joint, such being constructed and arranged substantially in manner and to operate as here'- inatter specified. The air from the chamber about the radiator maybe caused to pass into the lower ends of the pipes which go through the radiator, and after coursing through them may be discharged into such chamber, such air being heated in its passage through the pipes. I prefer, however, to apply or connect to each of such pipes, and to the lower end thereof, another pipe to lead through the airchamber, and so as to convey into the firstmentioned pipe air from without the air-chamber, for I'have found that such air on entering the radiator-pipe will be cooler than air taken from the air-chamber, and, as a necessary result-,will operate to better advantage in preventing the radiator-pipe from extending lengthwise. As the radiator-pipes will expand. quicker than the radiat-or at the period of first making a fire in the furnace, it becomes desirable to check the said expansion to an extent which will cause it to comport with that of the radiator. Now, this result may be approximated, if not entirely. effected, by introducing into the radiator-pipes air from without the hot-air chamber; The lower end of each radiator-pipe is connected with the side of the radiator by an ordinary sand joint, K, which consists not only of a short pipe, at, but of a concentric box, I), the lattercontaining sand. The lower end of the radiator-pipe shuts over the pipe a, enters the box I), and is to be covered by a mass ofsand or some equivalent placed therein. The short pipe a may open either into the airchamber about the radiator orinto an air pipe or conduit, H. I The upper joint of each of the pipes G is a coinponnd one-that is to say, it'is composed of a i'usibleinetaljoint and what is termed a sand joint, which are constructed in the following manner: The pipe G has two bowls. c d. cast around or applied about it, one of them being placed within the other. A conical or cylindrical tube, 6, extends from the top 9 down into the bowl 0. Anothersuch pipe, f, also projects down from the said topg and into the Both pipes G andf open out of the.

and as the partition-pipe f dips into it such lead will preserve atightjoint. The pipe or part c is not essential to my invention, but is a useful auxiliary, as it contributes, with the sand, to preserve a tight joint. The part f, extending into the sand as well as into the lead, aids in making a sand joint as well as a fusiblemetaljoint. The compound jointis a yielding one, as it will not only allow the pipe G to accom modate itselfto the metal, butto the lateral expansions and contractions of the radiator.

The lowerjoint of the pipe will. allow of longitudinal as well as lateral movementsof the pipe.

It will be seen from the above that thelower end of the air-pipeis not fastened to the radiator by screw-bolts, so as to be immovable, but in reality is'in no respect fastened thereto. My mode of applying each of the air-pipes t0 the radiatorviz., by yieldingjoints, both at top and bottom-it will thus be seen,is one of great utility.

I claim- 1. Supporting each of the air-conduits G by yieldingjoints, substantially as set forth, arranged at both ends of the same, and with re spect to the top and side of the radiator, as specified.

2. The combination of the sand and fusiblemetal joints, constructed and arranged substantially in manner and so as to operatetogether as specified.

' JOHN .MAGEE.

Witnesses:

R. H. EDDY, F. P. HALE, Jr. 

